[-100]*[3/10-1/2+1/5-0.1]

问题描述:

[-100]*[3/10-1/2+1/5-0.1]

把-100乘进去,乘以每个项的结果是:-30+50-20+10=-10

(-100)*(0.3-0.5+0.2-0.1)
=(-100)*(-0.1)
=10